No one knows exactly how it began. Some say Optimus Prime needed a little extra oomph during battle and Bulkhead volunteered to lend a hand … literally. Others say someone on Cybertron discovered some experimental Energon and started producing scrambled bots. However it started, everyone agrees only one question really matters now: are you ready to Make Your Mash-Up? The battle between the Autobots and Decepticons has seen many types of bots, but none of them quite like this!